JPS5528655A - Frequency discrimination circuit - Google Patents
Frequency discrimination circuitInfo
- Publication number
- JPS5528655A JPS5528655A JP10219178A JP10219178A JPS5528655A JP S5528655 A JPS5528655 A JP S5528655A JP 10219178 A JP10219178 A JP 10219178A JP 10219178 A JP10219178 A JP 10219178A JP S5528655 A JPS5528655 A JP S5528655A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuits
- tuning
- negative
- half wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Amplifiers (AREA)
Abstract
PURPOSE: To obtain the output signal of high performance, by using the negative feedback in place of the diode used for the level detection circuit and preventing the distortion of the demodulation signal by the level detection circuit.
CONSTITUTION: The frequency modulation signal inputted to the input terminal 1 is branched into two with the load tuning circuit 3, and after respective modulation signals are amplified at the amplifying transistors 4 and 5, they are fed to the tuning circuits 6 and 7. To the carrier frequency from the circuits 6 and 7, the tuning frequency symmetrical up and down is fed to the half wave linear rectifying circuits 21 and 31. The rectifying circuits 21 and 31 are provided with the doides 25 and 35 which half-wave-rectify the input signal and negative-feed-back it to the amplifiers 24 and 34, and with the diodes 26 and 36 which clamp the half wave of the input signal, and the high frequeny amplifying circuits 24 and 34. The operation at the rectifying circuits 21 and 31 can be detected at the linear part to the negative half wave of the input signal, and the detected signal is synthesized at the load resistors 10 and 11, to output a signal less in the distortion at the output terminal 12.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10219178A JPS5528655A (en) | 1978-08-22 | 1978-08-22 | Frequency discrimination circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10219178A JPS5528655A (en) | 1978-08-22 | 1978-08-22 | Frequency discrimination circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5528655A true JPS5528655A (en) | 1980-02-29 |
Family
ID=14320765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10219178A Pending JPS5528655A (en) | 1978-08-22 | 1978-08-22 | Frequency discrimination circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5528655A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52116832A (en) * | 1976-03-26 | 1977-09-30 | Hewlett Packard Yokogawa | Rectifying circuit |
-
1978
- 1978-08-22 JP JP10219178A patent/JPS5528655A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52116832A (en) * | 1976-03-26 | 1977-09-30 | Hewlett Packard Yokogawa | Rectifying circuit |
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